i dont think it would be a massive stretch of the imagination to be able to train a robotic arm to hold a brush and reproduce something that is on screen and do it really well.
Machines like that already exist but specifically with oil painting there is a lot of important information in how was the paint applied. So it is really really hard. Too many decisions in tools used, angles of the strokes, pressure, thickness of the color etc.
You might make painting that looks identical from far away but when you come close it will be completely different.
SD is limited to only digital art first of all, so let's not get too over-excited and hyped around this tool just yet.